Die-maker&#39;s square



Aug. lhgpzs.-

" J. MICKLE D13 MAKERS SQUARE filed Feb. 29. i924 Patented Aug. 11, 1925.

UNITED STATES PATENT QFFECE.

WILLIAM J. MICKLE, 0F PITTSFIELD, MASSACHUSETTS.

DIE-MAKERS SQUARE.

To all whom z5 may concern.'

Be it known that I, WILLIAM J. MronLn, a citizen of the United States, residing at Pittsfield, in the county of Berkshire and State of Massachusetts, have invented certain new and useful Improvements in a Die- Makers Square, of which the following is a specification.

This invention relates to implements for tool makers and the primary object of the invention is to provide a die makers square which embodies a single blade having a knife edge, which can be adjusted to any angle in a circle, thereby elimnating the necessity of providing different squares for different angles or the necessity of providing different blades for the base or butt of the square.

Another important object of the invention is the provision of novel means for forming the base or butt of the square, whereby the active edge of the blade can be seen at all times, thereby effectively facilitating the use of the tool and insuring accurate work.

A further object of the invention is the provision of novel means for associating the blade with the base or butt, whereby the blade can be slid to the desired position and adjusted to any angle, for permitting the blade to be used for both outside and inside work.

A further object of the invention is the provision of novel means for holding the blade in place to prevent displacement thereof during its adjustment.

A still further object of the invention is to provide a die makers square of the above character, which will be durable and eiicient in use, one that will be simple and easy to manufacture, and one which can be placed upon the market at a small cost.

With these and other objects in View, the invention consists in the novel construction7 arrangement and formation of parts, as will be hereinafter more specifically described, claimed and illustrated in the accompanying drawings, in which drawings:

Figure 1 is a perspective view of the die makers square.

Figure 2 is a longitudinal section through the same.

Figure 3 is a section taken at right angles to Figure 2 on the line 3-3 of Figure 2.

Figure 4 is a transverse section taken on the line 4 4: of Figure 3 showing the blade in its inoperative position.

Figure 5 is a detail end elevation of the blade holding washer, and

Figure (i is a detail perspective view of the blade.

Referring to the drawings in detail, wherein similar reference characters designate corresponding parts throughout the several views, the letter' A generally indicates the improved die makers square, which comprises the butt or base 10, which is preferably formed from a solid block of steel or the like.

The butt or base 10 is provided at one end thereof with a pair of spaced parallel supporting arms 11 and 12, one of which is provided with a threaded bore 13 and the other a smooth aligned bore 11i. These arms 11 and 12 are adapted to receive therebetween the blade 15 of the square, which will be hereinafter more fully described.

The butt 10 between the arms 11 and 12 is provided with a substantial cylindrical sight opening 16, which permits the active edge of the blade to be seen at all times, thereby facilitating the use of the tool and insuring accurate work being done. One side face of the base or butt 10 is provided with a longitudinally extending relatively deep guard slot 17 in which the blade 15 is adapted to fit when the same is not in use. This guard slot effectively prevents injury to the blade by other tools coming into contact therewith.

The blade 15 comprises a longitudinally extending flat shank 17 one face of which is provided with a locking groove 18. The lmife edge 19 is formed on one longitudinal edge of the shank of the blade and this edge forms the active or working face of the blade.

This blade 15 is slidably and rotatably held between the arms 1l and 12 by novel means which will now be described. A blade washer 20 is provided having an axial opening therethrough for the reception of the adjusting screw 21 which is adapted to extend through the openings 13 and 14 in the arms 11 and 12. The outer end of the adjusting screw 21 is threaded so as to engage the threaded wall of said opening 13. The inner face of the blade washer 20 is cut away as at 22 and provided with a locking rib 23 which is adapted to lit in the locking groove 18 of the shank 17 of the blade and this forms means for supporting the said blade. A friction washer 24 is also provided for holding the blade in place and this washer has an axial opening therethrough for also receiving the screw 21. The friction washer 2a is normally held in engagement with the blade washer 2O and the blade 15 by means of an expansion. spring 25 which bears against the inner face of the arm 12 and the washer 2li. rlhe washer 24 is preferably provided with a. recess 26 for receivingthe said spring, whereby the spring is normally concealed from View and protected from dust, dirt, and the like.

ln order to facilitate the adjusting of the said screw 21, the head 27 thereof is provided with a diametrically extending opening in which is adapted to be inserted a suitable handle or crank 28. This of course permits a grip and leverage to be had on the said locking screw. Then it is desired to adjust the angle of the blade, it can be seen that it is merely necessary to loosen the lock screw 21 which will permit the changing of the angle of the blade by permitting the blade washer to rotate on the said lock screw 21. Owing to the friction washer 21- however, displacement of the blade is prevented and tension is kept on the said blade through the use of the spring 25. After the blade has been adjusted to the desired angle, it is merely necessary to again tighten the screw 21. The position of the blade can also be reversed from one side of the stock or base 10 to the other by sliding the blade between the washers 2O and 24 when the screw 21 has been loosened. The changing of the position of the blade allows the'blade to be used for all angles and also for inside and outside work.

From the foregoing description, it can be seen that I have provided an improved tool of a simple and durable character, which will effectively accomplish the work intended.

Changes in details may be made without departing from the spirit or the scope of this invention.

What l claim as new is:

1. A. die makers square comprising a butt having spaced perforated arms at one end, a locking screw extending through perforations of the arms, a rotatable washer mounted upon the screw between the arms, an adjustable blade carried by the washer. means co-ogeratingl with the screw for holding` the blade in different angnlar adjusted positions, the blade having an active knifeI edge formed thereon, and the butt having` a sight opening between the arms for permitting said active kniferedge to be seen at all times during use of the blade.

2. A tool makers square comprising a butt, a pair of parallel arms formed on one end of the butt having aligned openings therethrough, a lock screw extending through the openings in the arms, a washer carried by the lock screw, a blade supported by the washer, a friction washer disposed upon the screw and a spring coiled about the screw for engaging the friction washer for normally holding the same in engagement with the first mentioned washer and 'lade 3. A die makers square comprising a butt, a pair of spaced parallel apertured arms formed on one end of the butt. the butt having a sight opening therein inwardly of and between said arms, a locking` screw fitted in said arms, a blade, a washer rotatably mounted upon the screw and having means for slidably receiving said blade7 a friction washer disposed upon the locking screw and an expansion spring coiled about said screw and adapted to hold the friction washer in engagement with the first mentioned washer and said blade.

1n testimony whereof I affix my signature.

WILLIAM J. MICKLE. 

